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Another Herman Cain scandal, another gold mine for late night comedy — and a woman's allegation that she had a 13-year affair with the GOP candidate might be the richest yet.

Jon Stewart started the pile-on Tuesday night by looking on the bright side:

"Thirteen years! That is an admirable commitment to the woman with whom you are violating your spousal commitment. And two, after all those allegations of sexual harassment of underlings, nice to see Herman Cain going the consensual route! Kudos."

But he questioned the sense of conservatives who might react to the news by switching their allegiance to Newt Gingrich — who's dogged by some past marital infidelities of his own.

"I guess Newt Gingrich becomes the candidate for people who like Herman Cain but think he was too monogamous," he joked.